I use small palms, bromilliades and ferns. Not expensive and give a nice tropical feel. Bamboo is also nice but if you have pets don't get yellow bamboo as it can be poisonous.
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Good job finding/bumping this one blue.octopus (edit: credited wrong member)

It just so happens that Ive been ferreting away piccies of 'Pungas' (native tree-ferns) for a future expose' that I was going to post in 'Tamas New Workshop' thread, but this looks like a better spot..

That makes sense....now..lol. I think it was Blue octopus that bumped that one. Thanks for the info. Any type of fern you use the most? We had two Australian ferns that looked primeval and really good next to a tiki with a small palm just behind it. Take care and happy carving!

Armstrong Nursery has bromeliad plants growing in lava rock for sale. Not cheap at $24.99, since they're kind of small, but cool nonetheless. They're labeled as Hawaiian Volcano Plants. You're supposed to keep them in a saucer of water so I plan on putting mine in a scorpion bowl.

Please excuse the ugly work bookcase.
I promise it looks better than the picture portrays. That looks like cow dung.